<div id="column-left">
    <div class="box">
        <div class="box-heading"><h3>产品</h3></div>
        <div class="box-content">
            <div class="box-category">
                <ul>
                    <li>
                        <a href="../product.html" class="active">制备 Process</a>
                    </li>
                    <li>
                        <a href="../product.html">测量 Measurement</a>
                    </li>
                    <li>
                        <a href="../product.html">控制 Control</a>
                    </li>
                    <li>
                        <a href="../product.html">服务 Service</a>
                    </li>
                </ul>
            </div>
        </div>
    </div>
</div>